Wheelchairs Flashcards
wheel axel aligned posterior
increases the amount of energy required for propulsion by increasing the rolling resistance; increases the turning radius
wheel axis aligned anteriorly
increases ability to perform a ‘wheelie’
who would benefit from anti-tippers?
someone with decreased trunk control - prevent tipping and LOB
what’s the benefit from pull-to wheel locks with extensions?
they allow a pt to reach them with an uninvolved side
who would benefit from elevating leg rests?
dependent edema, redistribute forces
when are removable armrests necessary?
for a squat pivot or sliding board transfer, not needed for a stand pivot transfer
how often must someone who is dependent be repositioned in bed?
every 2 hours
min A %
25% assistance from PT
mod A %
50% assistance from PT
max A %
75% assistance from PT
Measure: seat height
heel to popliteal fold + 2inches (19.5-20.5in)
Measure: seat depth
posteior buttock to popliteal fold -2in (16in)
seat width
widest aspect of legs +2in (18in)
back height
seat of chair to axilla -4in; take into consideration the cushion (18in)
armrest height
seat of chair to olecranon process with elbow at 90deg; take into consideration the cushion (9in)
when is a hemi frame indicated
so a pt can self propel with BLE
what’s the difference about an amputee frame
center of gravity is shifted posteriorly so it doesn’t tip
geri chair
push chair - when a pt is dependent for mobility but not safe to operate a manual or power chair
reclining vs tilt in space
tilt in space is used when there are issues with sliding or extensor tone
planar vs. curved headrest
curved used when lateral support needed; either are used with reclining or tilt in space w/cs
planar back vs curved back insert vs custom
back support: mild = planar vs. moderate = curved trunk supported needed; custom = significant trunk support needed via postural concerns
low vs high back chair (below vs. above inf angle of scap)
low = good trunk control and can self propel; high = requires some spinal support with self propel OR has poor trunk control for power chair
removable seat insert or back insert… why?
so the w/c can fold
custom molded seat
for pelvic obliquities, or asymmetry
bevel front edge seat
=undercut edge, so pt can self propel with BLE
in general: planar vs. curved equipment
planar = mild support needed, curved = significant support needed
small handrims
normal - pt does not have hand grip or strength issues
large diameter handrims
some weakness in the BUE
rim projections for handrims
pt has difficulty gripping
covered hand rims
pt requires assistance for adequate grasp, or inc friction
one piece footplate
pt needs a supportive surface to maximize stability OR requires additonal lateral foot support
in general: custom
custom is for anyone with abnormalities that do not place their joints in midline so they need additional support
bariatric w/c
holds between 300-1000lbs
standard cushions
lightweight, but high shear force. EX: sunmate, stimulite, t-foam
liquid cushions
heavy, good with shear force; jay, flo-fit, avanit, action
air cushion
light weight, moderate with shear force, need to be heavily monitored: roho, bye bye decubiti
what does a central line measure?
pressure in the R atrium or superior vena cava
swan ganz catheter
meausres the pressure of the pulmonary artery - avoid excessive head, neck, or extremity movements with it in place
suprapubic vs. foley catheter
foley = into the urinary tract, suprapubic = into the patient’s bladder (performed under anesthesia)
what is myelography
invasive test that combines fluoroscopy (slow motion of joints) and radiography to look at spinal subarachnoid space - identify bone displacement/disk herniation
